WebMCP: A New Standard for AI Agents and Web Interaction
Originally published in Turkish. Read the original →
Backed by Google and Microsoft, WebMCP (Web Model Context Protocol) standardizes how websites interact with AI agents and consigns HTML scraping to history.
WebMCP, short for Web Model Context Protocol, is an innovative JavaScript API specification designed to fundamentally change how web applications interact with AI agents, browser agents and assistive technologies. Backed by industry giants such as Google and Microsoft, this new standard aims to let websites expose their functionality as structured tools, eliminating agents' reliance on traditional HTML scraping.
You can use the site's MCP config builder tool for this.
Understanding WebMCP
At its core, WebMCP extends the Navigator interface with a ModelContext API, allowing developers to register JavaScript functions enriched with natural language descriptions and JSON schemas. This positions web pages as client-side Model Context Protocol servers and opens the way to workflows in which users and agents can collaborate in the same web interface, preserving shared context without giving up user control.
API Structure
WebMCP offers two core APIs:
1. Declarative API: Tailored to standard HTML form actions, it simplifies interactions and leverages existing form-based logic. 2. Imperative API: Designed for complex JavaScript-based interactions, it allows nuanced, advanced actions that reflect more complex user interface interactions.
These APIs let agents make structured tool calls directly, significantly reducing the processing power and time consumed by DOM scraping and interaction simulation.
Practical Applications
WebMCP's potential use cases are varied and its scope is broad:
* Customer service ticket creation, * E-commerce shopping workflows, * Travel booking systems.
By allowing AI agents to interact efficiently with web pages, users can expect AI capabilities to be integrated seamlessly into their everyday web activities.
Current Status and Future Outlook
An early preview of WebMCP is currently available through Google Chrome's experimental program, with wider rollout expected in the coming months. Developers can try a “polyfill” implementation known as MCP-B to start testing and prototyping this cutting-edge functionality. As the technology matures, it is poised to reshape how web and AI interactions are designed and implemented.
Published as a W3C Draft Community Group Report in February 2026, WebMCP represents an important step toward making web applications “AI-agent ready” and marks a critical moment in the ongoing evolution of web standards.
